Anyone know when this was made?
I'm guessing before 1963 given the use of a postal zone (Chicago 12) instead of a zip code in the address.
It does have a 3-prong grounding plug on the power cord.
I'm guessing before 1963 given the use of a postal zone (Chicago 12) instead of a zip code in the address.
It does have a 3-prong grounding plug on the power cord.